CN115540604A - Sintering equipment for low-temperature sintering of piezoelectric ceramic material - Google Patents
Sintering equipment for low-temperature sintering of piezoelectric ceramic material Download PDFInfo
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- CN115540604A CN115540604A CN202211254843.5A CN202211254843A CN115540604A CN 115540604 A CN115540604 A CN 115540604A CN 202211254843 A CN202211254843 A CN 202211254843A CN 115540604 A CN115540604 A CN 115540604A
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- sintering
- cylindrical shell
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- sleeve
- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
- F27D1/1858—Doors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
Abstract
The invention relates to sintering equipment for low-temperature sintering of piezoelectric ceramic materials, which relates to the technical field of metal heat treatment and comprises a base, wherein a sintering box is arranged on one side of the base, and a groove is formed in one side of the sintering box; the cylindrical shell is arranged in the groove, a first cavity is formed between the cylindrical shell and the groove, and resistance wires are uniformly laid on the inner arc surface of the cylindrical shell; the sintering column is horizontally arranged in the cylindrical shell, one end of the sintering column is fixedly connected with the inside of the cylindrical shell, and resistance wires are uniformly laid on the surface of the sintering column; the surface of the sleeve is paved with conductive wires; the sintering disc is arranged on the sleeve; the movable feeding component is arranged on the other side of the base; the sealing door is arranged at the moving end of the moving feeding assembly and is fixedly connected with the end part of the sleeve; the pressurized air supply assembly is arranged at the bottom in the sintering box, and an air inlet pipe of the pressurized air supply assembly is communicated with the first cavity. Heated more evenly, still add atmosphere gas in the cylindrical shell and pressurize, and in order to accelerate sintering efficiency to and further improve sintering quality.
Description
Technical Field
The invention relates to the technical field of heat treatment, in particular to sintering equipment for sintering piezoelectric ceramic materials at low temperature.
Background
The piezoelectric ceramics are mainly used for manufacturing ultrasonic transducers, underwater transducers, electroacoustic transducers, ceramic filters, ceramic transformers, ceramic frequency discriminators, high-voltage generators, infrared detectors, surface acoustic wave devices, electro-optical devices, ignition and detonation devices, piezoelectric gyros and other equipment.
Piezoelectric ceramics are a class of electronic ceramic materials having piezoelectric properties. The main differences from a typical piezoelectric quartz crystal that does not contain a ferroelectric component are: the crystal phases constituting the main components are all ferroelectric crystal grains. Since the ceramic is a polycrystalline aggregate in which the grains are randomly oriented, the spontaneous polarization vectors of the individual ferroelectric grains therein are also disoriented. In order to make the ceramics exhibit macroscopic piezoelectric characteristics, it is necessary to subject the piezoelectric ceramics to a strong direct current electric field after firing and being repolarized at the end faces, and then to perform a polarization treatment so that the respective polarization vectors of the original disordered orientations are preferentially oriented in the direction of the electric field. After the electric field is cancelled, the piezoelectric ceramic after polarization treatment can retain a certain macroscopic remanent polarization strength, so that the ceramic has a certain piezoelectric property.
The prior patent application discloses sintering equipment for sintering piezoelectric ceramic materials at low temperature, which comprises a first power supply, a second power supply, a supporting mechanism, a first mounting block and a second mounting block, wherein the first mounting block is connected with the second mounting block through a lifting mechanism; a first sintering disc and a second sintering disc are correspondingly arranged in the first mounting block and the second mounting block respectively, and the first sintering disc and the second sintering disc form a sintering cavity; the inner walls of the first sintering disc and the second sintering disc are respectively provided with a plurality of chromium-nickel conductive wires which are electrically connected along the arc-shaped embedded type corresponding mode, and the first power supply is electrically connected with the chromium-nickel conductive wires. According to the invention, the chromium-nickel conductive wire is arranged, so that the effects that the first power supply is controlled to supply power to the chromium-nickel conductive wire, an electric field is generated around the first sintering disc and the second sintering disc, the temperature required by sintering and the time required by sintering are reduced under the influence of the electric field are achieved, and the chromium-nickel conductive wire has better practicability.
But this low-voltage electricity pottery sintering device need visit the sintering dish in the middle of getting when getting the material after the sintering and take out, and the inside remaining Wen Wendu of sintering device is high, and the potential safety hazard is great, does not have more comprehensive guarantee to staff's safety.
Disclosure of Invention
In order to overcome the disadvantages of the prior art described above, it is a primary object of the present invention to provide a sintering apparatus for low-temperature sintering of a piezoceramic material.
In order to achieve the above object, the present invention adopts the following technical solution, a sintering apparatus for low temperature sintering of piezoelectric ceramic material, comprising:
a base, wherein the sintering box is arranged on one side of the base,
one side of the sintering box is provided with a groove;
the cylindrical shell is arranged in the groove, a first cavity is formed between the cylindrical shell and the groove, and resistance wires are uniformly laid on the inner arc surface of the cylindrical shell;
the sintering column is horizontally arranged in the cylindrical shell, one end of the sintering column is fixedly connected with the inside of the cylindrical shell, and resistance wires are uniformly laid on the surface of the sintering column;
the surface of the sleeve is paved with conductive wires;
the sintering disc is arranged on the sleeve;
the movable feeding component is arranged on the other side of the base;
the sealing door is arranged at the moving end of the moving feeding assembly and is fixedly connected with the end part of the sleeve;
when the movable feeding assembly pushes the sealing door to move to contact with one side of the sintering box, the sleeve fixedly connected to one side of the movable door is sleeved on the sintering column;
and the pressurized air supply assembly is arranged at the bottom in the sintering box, and an air inlet pipe of the pressurized air supply assembly is communicated with the first cavity.
As a further optimization of the present invention, the method further comprises:
and the plurality of air pressure valves are respectively and uniformly arranged on the cylindrical shell and communicated with the first cavity and the inside of the cylindrical shell.
As a further optimization of the invention, the mobile feeding assembly comprises:
the fixing plate is vertically arranged on the other side of the top of the base and is fixedly connected with the base;
the first hydraulic telescopic cylinder is arranged on one side, close to the sintering box, of the fixed plate, and the telescopic end of the first hydraulic telescopic cylinder is fixedly connected with the sealing door.
As a further optimization of the present invention, the method further comprises:
the sealing ring is arranged on one side, close to the sintering box, of the sealing door;
and the conductive silica gel block is arranged on the sealing door, is positioned on the inner ring of the sealing ring, is electrically connected with the power supply, and is in contact with the sintering box when the sealing door is in contact with the sintering box, and is in contact with the conductive wires on the sintering column.
As a further refinement of the present invention, the pressurized air delivery assembly comprises:
the gas box is arranged on one side of the top of the bottom plate;
and one end of the air supply pipe is communicated with the gas box through an air pump, and the other end of the air supply pipe penetrates into the sintering box and is communicated with the first cavity.
As a further optimization of the present invention, the method further comprises:
the temperature sensors are uniformly arranged in the cylindrical shell respectively;
and the controller is arranged on the fixing plate and controls the on-off of the power switch according to the temperature signals detected by the plurality of temperature sensors.
As a further optimization of the invention, the sintering disk is fixedly connected with the sleeve through a support rod.
As a further optimization of the invention, the number of the sintering discs is at least four, and the sintering discs are uniformly arranged along the sleeve.
Compared with the prior art, the invention has the beneficial effects that:
the sintering tray is arranged on the pipe sleeve, the pipe sleeve can stretch along with the movable feeding assembly, so that the pipe sleeve can be inserted into or taken out of the cylindrical shell for sintering, when the movable feeding assembly is in a contraction state, the sealing door drives the pipe sleeve to be far away from the sintering box, the sintering tray on the pipe sleeve is completely exposed, loading and unloading are facilitated, in order to enable workpieces in the sintering tray to be heated uniformly during sintering and obtain better performance, the cylindrical shell for sintering in the sintering box is also internally provided with the sintering columns, the workpieces in the multidirectional sintering tray are heated more uniformly, in addition, in order to accelerate sintering efficiency, atmosphere gas is added into the cylindrical shell for pressurization, and the sintering quality is further improved.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention in an unsintered state;
FIG. 2 is a schematic cross-sectional view of the sintered state of the present invention;
fig. 3 is a schematic cross-sectional structure of the bushing of the present invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Example (b):
referring to fig. 1 to 3, a sintering apparatus for low-temperature sintering of a piezoelectric ceramic material, includes: the sintering box 1 is arranged on one side of the base, and a groove is formed in one side of the sintering box 1; the cylindrical shell is arranged in the groove, a first cavity is formed between the cylindrical shell and the groove, and resistance wires are uniformly laid on the inner arc surface of the cylindrical shell; the sintering column 3 is horizontally arranged in the cylindrical shell, one end of the sintering column is fixedly connected with the inside of the cylindrical shell, and resistance wires are uniformly laid on the surface of the sintering column; the surface of the sleeve 6 is paved with conductive wires; the sintering disc 11 is arranged on the sleeve 6; the movable feeding component is arranged on the other side of the base; the sealing door 7 is arranged at the moving end of the moving feeding assembly and is fixedly connected with the end part of the sleeve 6; when the movable feeding assembly pushes the sealing door 7 to move to contact with one side of the sintering box 1, the sleeve 6 fixedly connected to one side of the movable door 7 is sleeved on the sintering column 3; the pressurizing air supply assembly is arranged at the bottom in the sintering box 1, an air inlet pipe of the pressurizing air supply assembly is communicated with the first cavity, and in the sintering process, atmosphere gas is added, so that the internal pressure is increased, and the sintering time is shortened.
As a further optimization of the present invention, the method further comprises: the plurality of air pressure valves are used as air outlet ends of the pressurized air supply assembly, are respectively and uniformly arranged on the cylindrical shell and are communicated with the interior of the first cavity and the interior of the cylindrical shell, when enough atmosphere gas is fed into the first cavity, the pressure in the first cavity is increased, and the plurality of air pressure valves are opened due to the pressure in the first cavity, so that the atmosphere gas in the first cavity enters the interior of the cylindrical shell.
Example 2
On the basis of the embodiment 1, as a further optimization of the invention, the mobile feeding assembly comprises: the fixed plate 8 is vertically arranged on the other side of the top of the base and is fixedly connected with the base; the first hydraulic telescopic cylinder 10 is arranged on one side, close to the sintering box 1, of the fixed plate 8, and the telescopic end of the first hydraulic telescopic cylinder is fixedly connected with the sealing door 7.
In order to ensure the sintering quality, the tightness in the sintering process is particularly important, and as further optimization of the invention, the invention also comprises the following steps: the sealing ring is arranged on one side, close to the sintering box 1, of the sealing door 7; the conductive silica gel block is arranged on the sealing door 7, is positioned at the inner ring of the sealing ring, is electrically connected with the power supply, and is in contact with the sintering box 1 when the sealing door 7 is in contact with the sintering box, the conductive silica gel block is in contact with the conductive wire on the sintering column 3, the power supply is turned on, the resistance wire starts to work, and the temperature in the space for sintering in the cylindrical shell is gradually and stably improved.
In order to accelerate the sintering rate, the inside of the sintering box can be pressurized, and as a further optimization of the invention, the pressurized gas feeding assembly comprises: the gas box 9 is arranged on one side of the top of the bottom plate; one end of the air supply pipe is communicated with the gas box 9 through an air pump, and the other end of the air supply pipe penetrates into the sintering box 1 and is communicated with the first cavity.
In order to ensure uniform internal temperature variation, the invention further comprises: the temperature sensors are uniformly arranged in the cylindrical shell respectively; and the controller is arranged on the fixing plate 8 and controls the on-off of the power switch according to the temperature signals detected by the plurality of temperature sensors, and the resistance wire is electrically connected with the power supply.
As a further optimization of the invention, referring to fig. 3, the sintering trays 11 are fixedly connected with the sleeve 6 through the support rods, in order to improve efficiency, the material density can be increased, but the number of the sintering trays is at least four, the sintering trays are uniformly arranged around the sleeve 6, and the bearing surfaces of the sintering trays are all arranged upwards, so that the material changing is convenient.
The invention relates to a basic working principle of sintering equipment for sintering piezoelectric ceramic materials at low temperature, which comprises the following steps:
in the invention, a sintering disc 11 is arranged on a sleeve 6, the sleeve 6 can stretch along with a movable feeding assembly, so that a pipe sleeve can go deep into or be taken out from a cylindrical shell for sintering, when the movable feeding assembly is in a contraction state, a sealing door 7 drives the sleeve 6 to move on a base far away from one side of a sintering box 1, and the sintering disc 11 on the sleeve 6 is completely exposed, so that loading and unloading are convenient, in order to ensure that workpieces in the sintering disc 11 are uniformly heated during sintering and obtain better performance, a sintering column 3 is also arranged in the cylindrical shell for sintering in the sintering box 1, workpieces in the multidirectional sintering disc 11 are heated more uniformly, in order to accelerate sintering efficiency, atmosphere gas is added into the cylindrical shell for pressurization, so that sintering quality is improved, in order to realize low-temperature sintering, a temperature sensor is arranged in the cylindrical shell, the internal temperature is monitored, the change of the internal temperature is detected, when a controller receives a sintering temperature signal and reaches a set threshold value, a conductive wire electrically connected with a power supply is electrified, so that an electric field is formed in the cylindrical shell, the sintering efficiency is reduced, and the sintering efficiency is accelerated.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above embodiments are merely illustrative and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims.
Claims (8)
1. A sintering equipment for low-temperature sintering piezoceramic material comprises a sintering box (1) and is characterized by also comprising
The sintering box (1) is arranged on one side of the base;
one side of the sintering box (1) is provided with a groove;
the cylindrical shell is arranged in the groove, a first cavity is formed between the cylindrical shell and the side wall of the groove, and resistance wires are uniformly laid on the inner arc surface of the cylindrical shell;
the sintering column (3) is horizontally arranged in the cylindrical shell, one end of the sintering column is fixedly connected with the inside of the cylindrical shell, and resistance wires are uniformly laid on the surface of the sintering column;
the surface of the sleeve (6) is paved with conductive wires;
the sintering disc (11) is horizontally arranged on the sleeve (6), and the bearing surface of the sintering disc is arranged upwards;
the movable feeding component is arranged on the other side of the base;
the sealing door (7) is arranged at the moving end of the moving feeding assembly and is fixedly connected with one end part of the sleeve (6), and when the moving feeding assembly pushes the sealing door (7) to move to be in contact with one side of the sintering box (1), the sleeve (6) fixedly connected to one side of the moving door (7) is sleeved on the sintering column (3);
and the pressurized air supply assembly is arranged at the bottom in the sintering box (1), and an air inlet pipe of the pressurized air supply assembly is communicated with the first cavity.
2. The sintering apparatus for low-temperature sintering of piezoceramic material according to claim 1, further comprising:
and the plurality of air pressure valves are respectively and uniformly arranged on the cylindrical shell and are communicated with the interior of the cylindrical shell.
3. The sintering apparatus for low temperature sintering of piezoceramic material according to claim 1, wherein the moving feed assembly comprises:
the fixing plate (8) is vertically arranged on the other side of the top of the base and is fixedly connected with the base;
the first hydraulic telescopic cylinder (10) is arranged on one side, close to the sintering box (1), of the fixing plate (8), and the telescopic end of the first hydraulic telescopic cylinder is fixedly connected with the sealing door (7).
4. The sintering apparatus for low-temperature sintering of piezoceramic material according to claim 1, further comprising:
the sealing ring is arranged on one side, close to the sintering box (1), of the sealing door (7);
the conductive silica gel block is arranged on the sealing door (7) and located at the inner ring of the sealing ring, the sealing door (7) is in contact with one side, close to the sintering box (1), of the sintering box, and is electrically connected with a power supply, when the sealing door (7) is in contact with the sintering box (1), and the conductive silica gel block is in contact with the conductive wire on the sintering column (3).
5. The sintering apparatus for low temperature sintering of piezoceramic material according to claim 1, wherein the pressurized gas delivery assembly comprises:
the gas box (9) is arranged on one side of the top of the bottom plate;
one end of the air feed pipe is communicated with the gas box (9) through an air pump, and the other end of the air feed pipe penetrates into the sintering box (1) and is communicated with the first cavity.
6. The sintering apparatus for low-temperature sintering of a piezoceramic material according to claim 3, further comprising:
the temperature sensors are uniformly arranged in the cylindrical shell respectively;
the controller is arranged on the fixing plate (8) and controls the on-off of the power switch according to the temperature signals detected by the plurality of temperature sensors, and the resistance wires are electrically connected with the power supply.
7. A sintering apparatus for low-temperature sintering of piezoceramic material according to claim 3, characterized in that the sintering disk (11) is fixedly connected with the sleeve (6) by means of a support rod.
8. A sintering apparatus for low-temperature sintering of piezoceramic material according to claim 3, characterized in that the number of sintering disks is at least four, evenly arranged along the sleeve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211254843.5A CN115540604A (en) | 2022-10-13 | 2022-10-13 | Sintering equipment for low-temperature sintering of piezoelectric ceramic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211254843.5A CN115540604A (en) | 2022-10-13 | 2022-10-13 | Sintering equipment for low-temperature sintering of piezoelectric ceramic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115540604A true CN115540604A (en) | 2022-12-30 |
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ID=84732612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211254843.5A Withdrawn CN115540604A (en) | 2022-10-13 | 2022-10-13 | Sintering equipment for low-temperature sintering of piezoelectric ceramic material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115540604A (en) |
-
2022
- 2022-10-13 CN CN202211254843.5A patent/CN115540604A/en not_active Withdrawn
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20221230 |
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| WW01 | Invention patent application withdrawn after publication |